Drilling-machine.



PATBNTED FEB. 3, 1903. E. M. COUCH. DRILLING MACHINE. APPLICATION P I LED AUG. 1, 1902.

6 SHEETS-SHEET 1.

I0 MODEL.

I I l l I I I I I I l I m w M Z crmjmm. WASHIN No. 719,569. PATENTED FEB. 3,1903.

E. M. 00mm. DRILLING MACHINE.

APPLICATION FILED AUG. 1, 1902.

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wc'zzeqs-setsz- I I v 4 No. 719,569. PATENTED FEB. 3, 1903;

E. M. 0011011. DRILLING MACHINE.

APPLIOATION FILED AUG. 1, 1902.

NO MODEL.

' 6 SHEETS-SHEET 3.

m 4 28 w z I nm 0 9 1 3 B E P D E T N E T A P R C U o C M R DRILLING MACHINE,-

APPLICATION FILED we. 1. 1902.

0 SHEETS-SHEET 4.

10 MODEL.

No. 719,569. v PATENTED FEB. 3, 1903. E. M. COUCH.

DRILLING MACHINE.

APPLICATION FILED AUG. 1, 1902. no MODEL. e SHEETS-$33111 5.

PATENTED FEB. 3, 1903."

DRILLING MACHINE.

APPLICATION FILED AUG. I 1902 6 BEBETS-BHEET 8.

'no MODEL.

UNTTED STATES PATENT OFFICE.

ELBERT M. COUCH, OF HARTFORD, CONNECTICUT, ASSIGNOR TO WHITNEY MANUFACTURING COMPANY, OF HARTFORD, CONNECTICUT, A CORPO- RATION OF CONNECTICUT.

DRlLLlNG-MACHlNE.

SPECIFICATION forming part of Letters Patent No. 719,569, dated February 3, 1903. I

Application filed August 1, 1902. Serial No. 117,922. (No model.)

To all whom, it may concern: tional View of the three-way Valve shown in Beitknown thatLELBERTll/I. COUCH, aciti- Fig. 9 in its position on the frame of the mazenoftheUnitedStatesofAmerica,residingat chine. Fig. 11 is a perspective view of the Hartford, in the county of Hartford and State rotatable wing in said three-way valve.

of Connecticut, have invented new and useful Referring to the drawings, a indicates the Improvements in Drilling-Machines, of which standard of the machine, the broadened base the following is a specification. (a portion of which shows in Fig. 1) being This invention relates todrilling-machines, hollow and serving as an oil-reservoir. This and has for its object the provision of a mapart is indicated by b. Surrounding the up- 10 chine whereby great accuracy of bore is obper part of this base I) of the standard is an tained, both as to alinement, diameter, and oil basin or table 0, havingan upturned flange depth, a further object being to provide defor catching the oil which drains through a vices of improved construction whereby a strainer into the reservoir 1), as usual in madrill may be lubricated by means of oil forced chines of this type.

15 to the point of the drill through a channel in On the front side of the frame or standard the latter; and a still further object lies in a there is provided a slideway a, on which the construction and combination, with other certain parts of the machine may have a verimprovements, of a device for stopping the tically-sliding movement, as will more fully feed movement of the drill at any desired appear farther on.

20 point, whereby a hole may be bored to its eX- In this machine the drill is stationary and act predetermined depth. is fed against the work, which revolves, and

Otherimprovementsin the construction inthe drill is mounted upon a carriage, which cidental to the above features also form part is indicated by d and is shown in Fig. 1 in of this invention, all of which will be fully side elevation and in Figs. 7 and 8 in vertical 25 described farther on and properly summaand horizontal sections. v On this drill-carrized in the claims. riage is a shaft e, on which there is keyed a In the drawings forming part of this apworm-gearf', which engages with afeed-screw plication, Figure l is a side elevation of a g, which is located in a channel in the standdrilling-machine embodying my invention. ard, which opens through the front face of 30 Fig. 2 is a vertical sectional elevation, on a the latter, as shown in Figs. 7 and 8. The larger scale than Fig. 1, showing the drivingcarriage (Z has a vertically-sliding movement head of the machine. Fig. 3 is a horizontal on the slideway a. This carriage is actuated sectional view on line 3 3, Fig. 2. Fig. 4 is a by the feed-screw g acting on the worm-gear sectional elevation of a portion of a drill, a f, the latter during the feeding movement be- 5 portion of the drill-guide, and oil-conduit. ing held stationaryand havingthesame func- Fig. 5 is asectional elevation, taken on same tions as a nut, through which the shaft 6 plane as Fig. 2, showing the construction of might pass. This shaft-e, on which the wormthe work-holding fixture, its easing, the drillgearf is mounted, is prevented from rotatguide, and a portion of the drill. Fig. 6 is a ing by the engagement with the teeth of a 40 horizontal sectional view in the plane of the ratchet 'i, keyed on the shaft of a pawl-lever line 6 6, Fig. 5. Fig. 7 is a sectional elevaj, (shown in Fig. 7,) which is mounted. on a tion of devices for feeding the drill against portion of the carriage d and is adapted to the work and for adjusting the drill. Fig. b swing thereon into and out of engagement is a horizontal sectional view of the mechanwith the teeth of said ratchet 2'. During the 5 ism shown in Fig. 7, said section being in the continuance of this engagement the shaft e 5 plane of line 8 8. Fig. 9 isaperspective View will be non-rotatable, and the worm-gear f of devices for arresting the feed movement will serve as a nut, whereby the carriage (l of the drill at a predetermined point and inmay be elevated by the rotation of the feedcluding also a three-way valve actuated by screw g.

50 said devices. Fig. 10 is a horizontal sec- When it is desired to effect a rapid adj ust- IQO there is clamped a hollow drill-support m, the

body of which constitutes an oil-reservoir for the drill, (which is shown in Figs. 1, 7, and 8,) on the upper end of which is a head to receive a set-screw for locking the drill in said support, the drill beingindicated byn. The bottom of said support m is closed by a screwpiug, thus permitting the drill to be drawn down through the support to remove it as desired. Through the side of the support there is an oil-channel 0, leading into another channel p, lying at right angles thereto, which latter is in direct communication with the oilsupply pipe q, the description of which will be taken up later on. The drill-supportm is removably supported in the carriage (Z in a sort of compression-chuck, and it may be readily removed therefrom by unscrewing the nut r and swinging the clamping-jaw s outward. Just under the head of the drill support, through which the set-screw passes, as shown in Fig. 7, there is a packing-washer t, which prevents the oil in the body of the drill-support from escaping upward around the drill or through the channel 10 in the side thereof, the Washer having a tongue thereon for closing said channel. The tongue of this washer t does not ShOW clearlyin the drawings; but it is formed by cutting a central aperture through the said washer which conforms to the cross-sectional view of the drill as shown in Fig. 8.

The drill is of that Well-known type which is provided with an oil-duct u, extending from the shank to a point near the cuttinglip of the drill, through which oil or other lubricant may be forced to, supply the point of the drill with the lubrication necessary in certain classes of work.

Mounted upon the slideway a, of the frame is the vertically-movable drill-rest '11, upon the lower end of which there is secured a semispherical oil-receptacle w, from which a spout a: may conduct oil and chips into a can 11 or other suitable receptacle placed alongside of the standard on the basin 0, as shown in Fig. 1.

Within this can is the usual strainer for catch-' ing chips, the oil flowing out of an opening in the lower part of the can into the flanged basin 0 and from thence into the reservoir, as described. The drillnpasses through said receptacle w centrally thereof and up through a tapered drill-guide .2, which fits into a similarly-tapered sleeve 2, which is locked against rotation in the drill-rest o by a screw3, whose inner end is threaded into a hole in the drillrest and which serves to force a sliding block 4 against the side of the sleeve 2, as shown in Fig. 6, whereby the said sleeve is held firmly in whatever position it may be adjusted to in the drill-rest. At that point where the drill passes through the receptacle w the channel at in the drill n is closed by a plunger 11, the nose of whichis spring-pressed into said channel. (See Fig. 4.) This plunger may be made of any suitable material which may be forced into the channel to make asubstantially oiltight joint between the latter and the wall of said receptacle. I

Means are provided for moving the sleeve 2 and the tapered drill-rest carried thereby endwise, which means consist in a rack 5, cut on the rear side of said sleeve and engaging gear-teeth 6, cut on the inner end of a short rotatable shaft lying transversely to the axis of the drill in the drill-rest, the outer end 7 of which projects beyond the side of the drillrest to receive a handle or some form of wrench, whereby it may be rotated. The object of this adjustment is to permit the upper end of the drill-guide to be moved up into close proximity to the work,whereby the point of the drill may be steadied when it first comes in contact with the work, as in this class of machines it is not customary nor always practicable to provide a center point for the guidance of the drill. Means are provided for securing the drill-rest o in any desired position on the slideway a,as, for example, the screws 8, (indicated in dotted lines in Fig. 5,)which are adapted to screw a gib up against the back side of the slideway to lock the drill-rest in place. The latter requires no powerful ICO means for holding it in position, as no strain is brought thereon when the drill isin operation, all of the thrust of the feed being taken up on the drill-carriage.

Extending vertically through the drill-rest t are one or more openings 9, constituting passages for the oil and chips, whereby they may be carried away from the casing 10, the

oil flowing into the receptacle w, thence outthrough the spout 0c. The casing 10 has no function excepttoinclose the rotatable workholding fixture, which is indicated by 12 and which may vary in form according to the dimensions of the work. Said casing is provided with a door 13, whereby access maybe had to the fixture 12 for securing a piece of work therein.

The fixture and the work shown in the drawings may be considered as purely conventional, the work being indicated by 1-1.. The lower end of the fixture, in all cases where it is practicable, should be adapted to receive the upper end of the drill-guide z, the upper end of this work-holding fixture being screwed onto the spindle 15, which is shown in Fig. 2 and a portion thereof in Fig. 5.' This spindle rotates the work, the work-holding fixture being screwed up against a shoulder on the lower end thereof solidly. This spindle is rotatably supported on the standard in a hollow head 16, (see Fig. 2,) whichis open at its rear side, the upper end of the spindle being threaded and provided with a suitable nut whereby it may be supported in axial alinement with the drill and whereby vertical adjustrnents thereof may be effected. At the lower-end of the spindle there is mounted thereon a sleeve 17, the lower end of whichis flanged and bears against a shoulder formed on the inner surface of a ring 18, which bears against the under side of the head 16. Between a shoulder on the spindle formed by the flange 19 and the lower end of the sleeve 17 is arranged a row of balls 20, which provides for the easy rotation of the spindle against the upthrust brought thereagainst during the operation of the machine, which thrust is directly against the head 16. The sleeve 17 is fixed in its position in the head 16 in any suitable way, and on the upper end thereof there is mounted a driving-pulley 21, which turns freely on said sleeve, there being, preferably, a ball-bearing for the pulley between it and theinner end of the sleeve 17, as shown in Fig. 2 of the drawings.

On the spindle 15 above the pulley 21 is the worm 22, which is rotatable with but slid able on the spindle, the lower end of said worm being provided with a relatively long hub, on which is mounted the friction-disk 23, which is rigidly secured on said hub by a key or otherwise. The face of this disk lies in close=proximity to the upper side of the pulley 21 and preferably is provided with a facing of leather. The worm 22 is counterbored from the upper end thereof toward the other to provide an annular chamber for the reception of a spiral spring 24, and above the worm there is located asleeve 25, against the lower end of which the spring 24 bears, a nut 27, screwed onto the spindle, serving as an abutment for the upper end of said sleeve and also as a means of adjustment for moving the sleeve relative to the spring to increase or diminish the tension of the latter. Mounted in the head 16 transversely to the axis of the spindle is a shaft 28, which is seen in section in Fig. 2 and in plan in Fig. 3. This shaft is mounted in two long bearings 29, each extending from the side of the head 16 to which they are bolted inward. nearly to the center of the shaft, and on the latter, between the ends of said bearings, there is keyed a worm-gear 30 in mesh with the worm 22. On one end of said shaft 28 there is nonrotatably secured a ratchet 31. On the opposite end of the shaft is fixed a gear 32,which meshes with an intermediate gear 33,'(shown only in Fig. 2,) which in turn meshes with a gear 34 on the end of a shaft 35, lying parallel with the shaft 28, and on said shaft 35 is a worm 36 in mesh with a worm-gear 37, keyed to the upper end of the feed-screw g. All this is clearly shown in Fig. 2, and it is only in this figure that the gears whereby movement is transmitted from the shaft 28 to the feed-screw are shown in dotted lines. As usual,where transmission-gears are employed in this manner the intermediate gear 33 is preferably mounted in a slotted arm, whereby some other gear of different diameter may be substituted to increase or diminish the speed of rotation of the feed-screw.

The driving-pulleyZl on the spindle 15 is rotated by a belt running from a suitable pulley on a counter-shaft 38, preferably mounted on brackets integral with the standard a, as shown in Fig. 1, and the pulley 21, as stated, runs idly on the sleeve 17 until the frictiondisk 23 is forced down against its upper side by the spring 24, as above described.

The shaft 28, on which is the worm-gear 30, is, as stated, provided with a ratchet-wheel 31 on one end thereof, and supported on the frame of the machine is an elbow-lever 39, one arm of which is adapted to swing into engagement with the teeth of said ratchetwheel and arrest abruptly the rotation of the shaft 28. Fig. 2 shows the driving-pulley 21 in operative engagement with the frictiondisk 23, and assuming that the parts are rotating in this position the worm 22 will rotate the shaft 28 and through its gear connections referred to impart rotary movement to the feed-screw g, which effects the upfeed of the drill, as heretofore described. The sudden engagement of the lever 39 with the ratchetwheel 31 immediately converts the worm-gear 30 from a driving member for the feed-screw g into what is, in effect, a stationary nut, and therefore the continued rotation of the pulley 21 immediately efiects the separation of the disk 23 therefrom, for the worm 22, acting on the worm-gear 30 as on a nut, lifts the disk 23 out of driving engagement with the pulley 21. This upward movement of the worm effects the compression of the spring 24, so that as soon as the lever 39 is swung out of en'- gagement with the ratchet-wheel 31 the spring instantly forces the disk 23 again into driving engagement with the pulley 21, the power'of the spring being sufficient to rotate the work carried by the spindle against the drill.

The devices whereby the lever 39 is swung automatically into and out of engagement with the ratchet-wheel 31 will now be described, together with certain other parts of the machine coacting with the lever-operating means. On the hub of the lever 39, as shown only in Fig. 3, there is a spring40, which 01)- erates to swing said lever 39 in the direction which will effect the engagement of the short arm thereof with the ratchet-whee131,"this arm being held out of engagement with the ratchetwheel by means of an arm 41, mounted transversely upon the upperend of a shaft 42, (see Fig. 9,) which shaft is rotatably supported in suitable bearings on the side of the frame a, as shown in Fig. 1, and which is provided with acoiled spring 43, against the tension of which this shaft may be'rotated in one direction to causethe arm 41tobe swung against the end of the depending arm of the elbow-lever 39 to effect the disengagement of the other arm thereof from the ratchetwheel. This shaft 42 maybe manipulated by any suitable hand-lever, as 44, and when it has been actuated, as described above, to operate the lever 39 the opposite end of the arm 41 to that which engages said lever moves into engagement with a trip-lever 45, which is pivoted to the machine to swing in a vertical plane, and hung from the opposite end of this lever is a rod 46; which extends downward through a boss 47 on the drill-carriage.

d, on each side of which'boss are two adj ustable collars 48, whereby the movements of the drill-carriage may operate this rod and the trip-lever 45 to release the arm 41, which by the spring 43 is then swung away from the end of the lever 39,whose spring 40 throws it up into engagement with the ratchet-wheel 31, as described, instantly stopping thereby further movement of the feed-screw g. It is thus seen that the drill may be arrested in its upward feed movement at any desired point with great accuracy.

While the machine is of necessity brought to a stop from time to time, either to insert new work or for various other means, it is desirable that the pump which supplies oil to the drill should remain in continuousoperation, whereby the drill may be instantly supplied with oil upon the resumption of its work,

and for this reason the oil-pump 49, which is shown in Fig. 1, is driven by an independent work and spoken of generally as a gearpump. The suction-pipe thereof is indicated by 50 and the delivery-pipe by 51. This latter pipe is connected into a three-way valve 52, which is illustrated in detail in Figs. 10 and 12 and is also shown in Fig. 9, and in this last-named figure it is shown in its relation to the tripping devices, whereby when the feed movement of the screw is arrested the feeding of oil to the drill is also stopped, the stream of oil from the pipe 51 being diverted from the connection 53, extending from the drill-carriage to the three-way valve, and being turned by the operation of the valve:

through a by-pass port 54, which is shown in Fig. 9 and which communicates through a suitable opening in the frame with the oilreservoir in the base I).

The stem of the valve 52 is indicated by 55, and it extends upwardly parallel with the shaft 42 and is connected with the latter by a connecting-rod 56, extending from an arm 57 on the shaft 42 to the arm 58 on the stem.

of the three-way valve. By reason of these connections it is seen that the rotative movement of the shaft 42 will impart similar movements to the valve-stem 55, and when the machine is in operation the valve will cover the by-pass port 54, (see Fig. 10,) and when the shaft 42 is operated to arrest the feed movement of the drill the port 59, leading into the pipe connection 53, will be closed and the by-pass port opened. The valve is of the wing type and is movable radially on the stem 55, which it straddles, the pressure back of it within the valve-body keeping it to its seat. This wing is shown in perspective view in Fig. 11. The pipe connection 53 between the drill-carriage d and the valve must of necessity be an extensible one, and to this end it is made of two telescoping sections, one end of one section swinging on the drill-carriage and the end of the other section on the valve-body, these ends preferably being made in the form of union-joints and the two sections being provided with a packing-nut 60. In this way perfect freedom of movement is permitted to the drill-carriage without in terference with its proper oil-supply. Obviously this may be replaced by a flexible tube, if desired.

The driving means for the drill-spindle and the means for driving the'feed-screw g, together with the devices described for arresting instantly the shaft 28, have been described herein only as one of the component parts of the machine as a whole and will be claimed herein only in combination with such parts.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

1. A drilling-machine consisting of a spindle, a work-holding fixture rotated thereby, a drill, a continuously-rotating driving-pulley for the spindle, a clutch mechanism between the spindle and driving-pulley, a feed mechanism for the drill, and connections between the feed mechanism and the clutch mechanism whereby the feed mechanism may be driven and whereby the members of the clutch mechanism may be moved into and out of operative engagement.

2. A drilling-machine consisting of a spindle, a work-holding fixture on the spindle, a drill, a continuously-rotating driving-pulley on the spindle, a clutch mechanism between the spindle and driving-pulley, and a feedscrew for the drill; a worm on the spindle rotatable therewith and end wise movable thereon in connection with a member of the clutch mechanism, a worm-gear driven by the worm, and means for abruptlyarresting the rotation of the worm-gear whereby the latter may serve as a nut or rack for the worm to effect the operation of the clutch mechanism.

3. A drilling-machine consisting of a spindle, a work-holding fixture rotated thereby, a drill, a drill-carriage, a continuously-rotating driving-pulley for the spindle, a feed-screw for the dril1-carriage, and gear connections be-' tween the driving-pulley and the feed-screw to'rotate the latter; a worm-gear on the drillcarriage in mesh with the feed-screw, and means for holding said gear against rotation whereby it may constitute a nut for the feedscrew, together with releasing means for the worm-gear whereby the feed of the carriage may be arrested.

4. A drilling-machine consisting of a workrotating spindle, a drill, a drill-carriage and a feed-screw for the latter; a continuously-rotating driving-pulley on the spindle, a clutch mechanism between the latter and the driving-pulley, a worm fixed on the movable element of said clutch mechanism; a shaft, a worm-gear thereon for engagement with said worm, and gear connections extending between said shaft and the feed-screw; a swinging lever on the machine, one end of which is adapted to be moved into engagement with said worm-gear shaft to arrest the latter, and means actuated by the movement of the drillcarriage to move said swinging lever to arrest said Worm-gear shaft whereby said worm may constitute a screw, and said gear a nut to effect the separation of the engaging members of the clutch mechanism.

5. The combination of a spindle, a work holding fixture thereon, a drill-carriage, and means for feeding the latter toward the spindle, a drill-rest movable in line with the drillcarriage, a drill-guide in said rest, through which the drill passes, the end of said guide having a bearingin said work-holding fixture, means for adjusting said drill-guide axially, and means for securing it in its adjusted position.

6. The combination of a spindle, a Workholding fixture thereon, a drill having an oilduct extending longitudinally therethrough, means for supplying oil to the latter under pressure, a drill-rest, through which the cutting end of the drill passes, adjustable toward and from the work-fixture, a casing supported on said drill-rest, and inclosing said fixture, there being an oil-passage through the latter.

7. The combination with a work-rotating spindle, of a worm rotatable with the spindle and endwise movable thereon, a friction-disk to which the worm is secured, a driving-pulley, a spring for moving said disk against the pulley, a drill having an oil-duct extending lengthwise thereof, and means for forcing oil thereinto; a worm-gear and suitable connections between it and said drill for imparting feed movement to the latter, and means operated by the movement of the drill for abruptly arresting said worm-gear, whereby it may serve as a rack or nut for the worm; and devices actuated by the geanarresting means for stopping the fiow of oil to the drill.

8. The combination with a work-rotating spindle, of a worm rotatable with the spindle and endwise movable thereon, a friction-disk to which the worm is secured, a driving-pulley, a spring for moving said disk against the pulley, a drill having an oil-duct extending lengthwise thereof, and means for forcing oil thereinto; a worm-gear and suitable connections between it and said drill for imparting feed movement to the latter, and means operated by the movement of the drill for abruptly arresting said worm-gear, whereby it may serve as a rack or nut for the worm; and devices coacting with the gear arresting means for stopping the flow of oil to the drill, and means for manually operating said geararresting means independently of the feed movement of the drill.

9. The combination with a work-rotating spindle, of a worm rotatable with and endwise movable on the latter; a driving-pulley freely rotatable about said spindle; a clutchdisk rotatable with and slidable on the spindle, a spring for moving said disk into operative engagement with the driving-pulley; a drill; a worm-gear rotated by. the worm on the spindie, and suitable gear connections between said worm-gear and said drill for imparting feed movement to the latter, and means operated by the feed movement of the drill for arresting said Worm gear, whereby it may serve as a rack or nut for the worm to move the clutch-disk away from the driving-pulley, and thereby effect the compression of said clutch-operating spring.

ELBERT M. COUCH.

Witnesses:

WM. H. OHAPIN, O. E. WHITNEY. 

